Air conditioning chassis, outdoor unit and air conditioning unit

Abstract

This utility model discloses an air conditioner chassis, an outdoor unit, and an air conditioning unit. The air conditioner chassis includes: a refrigerant coil connected to the refrigerant pipeline of the air conditioning unit for introducing refrigerant from the air conditioning unit to heat and defrost the chassis; a refrigerant regulating device for controlling the refrigerant flow rate into the refrigerant coil; a first fiber optic temperature sensor located inside the refrigerant inlet for detecting the inlet refrigerant temperature; a second fiber optic temperature sensor located inside the refrigerant outlet for detecting the outlet refrigerant temperature; a reflected light sensor located above the air conditioner chassis for detecting the intensity of reflected light from the chassis; and a control device for controlling the refrigerant flow rate into the refrigerant coil based on the inlet refrigerant temperature, outlet refrigerant temperature, and reflected light intensity. This utility model solves the problems of poor safety and low measurement accuracy of temperature sensors in existing air conditioner chassis, improving the safety of temperature detection and the accuracy of defrosting.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to an air conditioning chassis, an air conditioning outdoor unit, and an air conditioning unit. Background Technology

[0002] In cold environments, the chassis surface of air conditioning and other refrigeration equipment remains cold. When water vapor in the air comes into contact with this surface, it condenses into ice. This ice formation obstructs airflow, reduces the equipment's heat exchange efficiency, and can even cause the equipment to malfunction.

[0003] Currently, the defrosting method for air conditioning chassis involves directly heating and melting accumulated ice using electric heating elements. The heating elements are activated, causing the ice to melt into water, which is then drained from the equipment via gravity or a drainage system. The defrosting process is typically triggered by a timer; when a preset time is reached, the heating elements are activated to begin defrosting. This method suffers from the problem of imprecise control during defrosting, resulting in low precision.

[0004] The air conditioner chassis is also equipped with temperature sensors to detect the surface temperature of the chassis. Traditional air conditioner chassis use electrical sensors, such as resistive temperature sensors. Electrical sensors may generate electrical sparks during operation and pose a short-circuit risk; they can also explode when exposed to flammable and explosive refrigerants. Furthermore, electrical sensors have low detection accuracy, slow response speed, and large size, making them unsuitable for installation inside the chassis. Their temperature monitoring is also significantly affected by ambient temperature, making it impossible to accurately monitor chassis temperature and control de-icing.

[0005] There is currently no effective solution to the problems of poor safety and low measurement accuracy of temperature sensors in air conditioning chassis in related technologies. Utility Model Content

[0006] This utility model provides an air conditioner chassis, an air conditioner outdoor unit, and an air conditioner unit, so as to at least solve the problems of poor safety and low measurement accuracy of temperature sensors in the existing air conditioner chassis.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present utility model, an air conditioning chassis is provided, comprising: a refrigerant coil located inside the air conditioning chassis and connected to the refrigerant pipeline of an air conditioning unit for introducing refrigerant from the air conditioning unit to heat and defrost the air conditioning chassis; wherein the refrigerant coil has a refrigerant inlet and a refrigerant outlet; a refrigerant regulating device, one end of which is connected to the refrigerant pipeline of the air conditioning unit and the other end of which is connected to the refrigerant coil, for controlling the refrigerant flow rate entering the refrigerant coil; a first fiber optic temperature sensor located inside the refrigerant inlet for detecting the inlet refrigerant temperature; a second fiber optic temperature sensor located inside the refrigerant outlet for detecting the outlet refrigerant temperature; a reflected light sensor located above the air conditioning chassis for detecting the reflected light intensity of the air conditioning chassis; and a control device, one end of which is connected to the first fiber optic temperature sensor, the second fiber optic temperature sensor, and the reflected light sensor, and the other end of which is connected to the refrigerant regulating device, for controlling the refrigerant flow rate entering the refrigerant coil based on the inlet refrigerant temperature, the outlet refrigerant temperature, and the reflected light intensity.

[0008] Furthermore, it also includes: the refrigerant inlet pipe, one end of which is connected to the refrigerant inlet and the other end of which is connected to the refrigerant pipeline of the air conditioning unit, for introducing the refrigerant of the air conditioning unit into the refrigerant coil; and the refrigerant outlet pipe, one end of which is connected to the refrigerant outlet and the other end of which is connected to the refrigerant pipeline of the air conditioning unit, for introducing the refrigerant from the refrigerant coil into the air conditioning unit.

[0009] Furthermore, the air conditioning unit includes a compressor, a four-way valve, an evaporator, and a condenser connected in sequence, wherein the refrigerant inlet pipe is connected to a refrigerant pipeline located between the compressor's exhaust port and the four-way valve, and the refrigerant outlet pipe is connected to a refrigerant pipeline located between the condenser's refrigerant outlet and the four-way valve.

[0010] Furthermore, the refrigerant regulating device includes a proportional regulating valve located at the connection between the refrigerant inlet pipe and the refrigerant pipeline of the air conditioning unit, used to regulate the refrigerant flow rate entering the refrigerant inlet pipe.

[0011] Furthermore, the reflected light sensor is a fiber optic infrared sensor, used to emit infrared light into the air conditioner chassis and detect the intensity of the reflected light; the control device includes: a fiber optic demodulation device, one end of which is connected to the first fiber optic temperature sensor, the second fiber optic temperature sensor, and the fiber optic infrared sensor, and the other end of which is connected to the proportional regulating valve, used to determine the icing condition of the air conditioner chassis based on the inlet refrigerant temperature, the outlet refrigerant temperature, and the intensity of the reflected light, and to adjust the opening of the proportional regulating valve according to the icing condition to regulate the refrigerant flow rate entering the refrigerant inlet pipe.

[0012] Furthermore, the air conditioning chassis includes an upper chassis and a lower chassis, the upper chassis and the lower chassis having correspondingly provided grooves, and the refrigerant flow path formed by the grooves serves as the refrigerant coil.

[0013] According to another aspect of the present invention, an air conditioner outdoor unit is provided, including the air conditioner chassis as described above.

[0014] According to another aspect of the present invention, an air conditioning unit is provided, including the outdoor unit of the air conditioner as described above.

[0015] This invention provides an air conditioning chassis with a refrigerant coil, which is heated by the refrigerant from the air conditioning unit. The refrigerant coil has a refrigerant inlet and an outlet, respectively, and is equipped with a first fiber optic temperature sensor and a second fiber optic temperature sensor to detect the inlet and outlet refrigerant temperatures. Additionally, a reflected light sensor is located above the air conditioning chassis to detect the intensity of reflected light. Based on the reflected light intensity, the reflection status of the air conditioning chassis can be determined, and combined with the refrigerant temperature, the icing status of the air conditioning chassis can be accurately determined to control the de-icing process. Therefore, this invention achieves de-icing by introducing high-temperature refrigerant from the air conditioning unit into the air conditioning chassis to heat it. The use of fiber optic sensors to detect temperature and light sensors to detect reflected light intensity ensures high safety and eliminates the risk of fire or explosion. Furthermore, the embedded temperature sensors enable high-precision temperature detection of the air conditioning chassis, and the combination of reflected light intensity and control significantly improves the accuracy and timeliness of de-icing control, thus enhancing the de-icing effect. Attached Figure Description

[0016] Figure 1 This is an optional top view schematic diagram of an air conditioning chassis according to an embodiment of the present utility model;

[0017] Figure 2 This is an optional front sectional view of an air conditioning chassis according to an embodiment of the present utility model;

[0018] Figure 3 This is an optional side sectional view of an air conditioning chassis according to an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of an optional structure of an air conditioning unit with an air conditioning chassis according to an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of another optional structure of an air conditioning unit with an air conditioning chassis according to an embodiment of the present utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. First fiber optic temperature sensor; 2. Second fiber optic temperature sensor; 3. Reflected light sensor; 4. Refrigerant flow path cross-section; 5. Capillary tube; 6. Air conditioner chassis; 7. Proportional regulating valve; 8. Compressor; 9. Four-way valve; 10. Condenser; 11. Evaporator; 12. Vapor-liquid separator; 13. Fiber optic demodulation device; 14. Refrigerant gas pipe; 15. Condenser post-pipeline. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. The singular forms “a,” “the,” and “the” used in the embodiments of this utility model and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0025] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0026] It should be understood that although the terms first, second, third, etc., may be used to describe controllers in the embodiments of this utility model, these controllers should not be limited to these terms. These terms are only used to distinguish controllers connected to different devices. For example, without departing from the scope of the embodiments of this utility model, a first controller may also be referred to as a second controller, and similarly, a second controller may also be referred to as a first controller.

[0027] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0028] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0029] The optional embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] In a preferred embodiment 1 of this utility model, an air conditioning chassis is provided. Specifically, Figure 1 An optional top view of the air conditioning chassis is shown, such as... Figure 1 As shown, the air conditioner chassis includes:

[0032] The refrigerant coil, located inside the air conditioner chassis, connects to the refrigerant piping of the air conditioning unit and is used to supply refrigerant from the unit to heat the chassis. The refrigerant coil has a refrigerant inlet and a refrigerant outlet. The refrigerant coil can be evenly distributed within the chassis to ensure uniform heating. Figure 1 As shown, the refrigerant coils are distributed in a serpentine pattern and are arranged as evenly as possible on the air conditioning chassis, so that every area of ​​the air conditioning chassis is heated;

[0033] The refrigerant regulating device is connected to the refrigerant pipeline of the air conditioning unit at one end and to the refrigerant coil at the other end. It is used to control the refrigerant flow into the refrigerant coil.

[0034] The first fiber optic temperature sensor 1 is located inside the refrigerant inlet and is used to detect the inlet refrigerant temperature.

[0035] The second fiber optic temperature sensor 2, located inside the refrigerant outlet, is used to detect the outlet refrigerant temperature; the first fiber optic temperature sensor 1 and the second fiber optic temperature sensor 2 are both fiber optic temperature sensors. A fiber optic grating sensor is a sensor that utilizes the wavelength-selective reflection caused by the periodic refractive index change as light propagates in an optical fiber. For temperature fiber optic gratings, the fiber optic grating is only affected by temperature; therefore, the change in wavelength can generally be expressed as a linear function.

[0036]

[0037] Δλ represents the change in center wavelength caused by temperature effects on the fiber grating; λ0 represents the initial center wavelength before temperature influence; C TΔT represents the temperature sensitivity coefficient of the fiber Bragg grating; ΔT represents the temperature change. Therefore, fiber optic sensors can detect temperature changes by measuring the change in wavelength.

[0038] Optionally, the first fiber optic temperature sensor 1 and the second fiber optic temperature sensor 2 are fiber Bragg grating sensors, combining the fiber optic sensors with the air conditioner chassis de-icing system. The advantages of fiber optic sensors can overcome the shortcomings of previous chassis de-icing devices. Traditional electrical sensors are bulky, while fiber optic sensors are filaments with a diameter of about 100 micrometers, small in size and light in weight, and can be implanted inside objects. Therefore, this invention places the fiber optic sensors in the refrigerant inlet and refrigerant outlet. The inlet and outlet refrigerant temperatures reflect the icing status of the air conditioner chassis, and then corresponding de-icing control is performed.

[0039] A reflected light sensor 3, located above the air conditioner chassis, is used to detect the intensity of reflected light from the chassis. This sensor can be a fiber optic infrared sensor, which utilizes the different light reflectivities of different object surfaces to detect the surface condition. The fiber optic infrared sensor emits infrared light towards the air conditioner chassis and detects the intensity of the reflected light. In other words, a fiber optic infrared sensor is placed above the air conditioner chassis to emit infrared light onto its surface and detect the intensity of the reflected light, thereby monitoring changes in the reflectivity of the chassis surface. The fiber optic infrared sensor has the following constraints:

[0040] I ref =R·I

[0041] I ref I is the intensity of reflected light; I is the intensity of emitted light; R is the light reflectivity of the object's surface.

[0042] When the air conditioner chassis is icy, the light reflectivity of metal or powder-coated metal is much greater than that of ice. Therefore, when infrared light shines on the chassis surface, the intensity of the infrared light reflected by the icy chassis will be greatly reduced. Thus, the fiber optic infrared sensor can detect whether the surface of the air conditioner chassis is icy by emitting infrared light and detecting the intensity of the reflected light.

[0043] Traditional chassis de-icing methods use electrical sensors, which pose a short-circuit risk, and the heating elements may generate electrical sparks during operation, potentially leading to an explosion when exposed to flammable or explosive refrigerants. In this invention, the sensor is a fiber optic sensor, eliminating the risk of fire and explosion in the de-icing device, significantly reducing safety hazards. Furthermore, the fiber optic sensor offers advantages such as small size, light weight, embeddability within the chassis, high temperature measurement accuracy, fast response, resistance to electromagnetic interference, no electrical sparks, and high safety, overcoming the technical problems of low temperature measurement accuracy and slow response of traditional resistive temperature sensors.

[0044] The air conditioner chassis is also equipped with a control device. One end is connected to a first fiber optic temperature sensor, a second fiber optic temperature sensor, and a reflected light sensor, while the other end is connected to a refrigerant regulating device. This device controls the refrigerant flow into the refrigerant coil based on the inlet refrigerant temperature, outlet refrigerant temperature, and reflected light intensity to defrost the air conditioner chassis. The inlet and outlet refrigerant temperatures, combined with the reflected light intensity, can accurately determine the icing status of the air conditioner chassis, thereby accurately controlling defrosting and improving the defrosting effect.

[0045] In the above embodiments, an air conditioning chassis is provided, which has a refrigerant coil for heating by the refrigerant from the air conditioning unit. The refrigerant coil has a refrigerant inlet and a refrigerant outlet, and is equipped with a first fiber optic temperature sensor and a second fiber optic temperature sensor to detect the inlet and outlet refrigerant temperatures, respectively. A reflected light sensor is also provided above the air conditioning chassis to detect the intensity of reflected light. Based on the intensity of reflected light, the reflection status of the air conditioning chassis can be determined. Combined with the refrigerant temperature, the icing status of the air conditioning chassis can be accurately determined to control the de-icing process. Therefore, this invention achieves de-icing by introducing high-temperature refrigerant from the air conditioning unit into the air conditioning chassis to heat it. The use of fiber optic sensors to detect temperature and light sensors to detect reflected light intensity eliminates the risk of fire and explosion, ensuring high safety. Furthermore, the embedded temperature sensors enable high-precision temperature detection of the air conditioning chassis. Combined with the reflected light intensity, the icing status of the air conditioning chassis can be accurately determined, significantly improving the control accuracy and timeliness of de-icing and enhancing the de-icing effect.

[0046] In a preferred embodiment of this utility model, the air conditioning chassis includes an upper chassis and a lower chassis, the upper chassis and the lower chassis having correspondingly provided grooves, and the refrigerant flow path formed by the grooves serves as a refrigerant coil. Figure 2 An optional front sectional view of the air conditioning chassis is shown. Figure 3 An optional side sectional view of the air conditioning chassis is shown, such as... Figure 2 and Figure 3 As shown, the upper and lower chassis are sealed, with refrigerant flow paths inside. During production, grooves are machined using molds to create the pre-designed refrigerant flow paths during chassis manufacturing. The upper and lower chassis are then fixed in place, ensuring a complete seal except for the refrigerant flow paths, forming a complete air conditioning chassis and guaranteeing the sealing of the entire refrigerant flow path. A fiber optic grating sensor is placed at both the refrigerant flow path inlet and outlet to measure the refrigerant temperature at these points.

[0047] Metal capillary tubes 5, namely the refrigerant outlet pipe and the refrigerant inlet pipe, are welded at the refrigerant outlet and inlet pipe, respectively. Specifically, one end of the refrigerant inlet pipe is connected to the refrigerant inlet, and the other end is connected to the refrigerant pipeline of the air conditioning unit, used to pass the refrigerant from the air conditioning unit into the refrigerant coil; one end of the refrigerant outlet pipe is connected to the refrigerant outlet, and the other end is connected to the refrigerant pipeline of the air conditioning unit, used to pass the refrigerant from the refrigerant coil into the air conditioning unit. The high-temperature refrigerant from the air conditioning unit flows to the air conditioning chassis through the refrigerant pipe, heating the air conditioning chassis to melt the ice, and finally flows back into the air conditioning unit, completing the circulation.

[0048] Figure 4 A schematic diagram of an optional structure for an air conditioning unit with an air conditioning chassis is shown, such as... Figure 4 As shown, the air conditioning unit includes a compressor 8, a four-way valve 9, an evaporator 11, and a condenser 10 connected in sequence. The refrigerant inlet pipe is connected to the refrigerant pipeline located between the exhaust port of the compressor 8 and the four-way valve 9, and the refrigerant outlet pipe is connected to the refrigerant pipeline located between the refrigerant outlet of the condenser 10 and the four-way valve 9. When the chassis de-icing starts, high-temperature refrigerant flows out from the exhaust pipe, through the air conditioning chassis, into the condenser rear pipe 15, then into the plate heat exchanger (evaporator 11), the vapor-liquid separator 12, and the compressor 8, finally returning to the exhaust pipe, thus completing the cycle.

[0049] like Figure 4 As shown, it also includes a proportional regulating valve 7, located at the connection between the refrigerant inlet pipe and the refrigerant pipeline of the air conditioning unit, used to regulate the refrigerant flow rate into the refrigerant inlet pipe. Both the refrigerant inlet pipe and the refrigerant outlet pipe use metal capillary tubes 5. When the proportional regulating valve 7 is open, the high-temperature refrigerant in the exhaust pipe flows through the metal capillary tube 5 to the air conditioning chassis, heating the air conditioning chassis to melt the ice, and finally flows into the condenser downstream pipe 15 to complete the circulation.

[0050] Figure 5 A schematic diagram of another optional structure for an air conditioning unit with an air conditioning chassis is shown, such as... Figure 5 As shown, the air conditioning unit consists of an air conditioning control unit (including a compressor 8, a vapor-liquid separator 12, a plate heat exchanger, air conditioning connecting pipes, etc.), an air conditioning chassis, a metal capillary tube 5, a fiber optic grating sensor, a fiber optic infrared sensor, a fiber optic demodulation device 13, a signal transmission line, a proportional control valve 7, refrigerant, etc. Figure 5 As shown, the fiber optic demodulation device 13 is connected at one end to the first fiber optic temperature sensor 1, the second fiber optic temperature sensor 2, and the reflected light sensor 3, and at the other end to the proportional control valve 7. It is used to determine the icing condition of the air conditioning chassis based on the inlet refrigerant temperature, the outlet refrigerant temperature, and the reflected light intensity, and to adjust the opening of the proportional control valve according to the icing condition to control the air conditioning chassis to defrost.

[0051] Preferably, the fiber optic demodulation device 13 controls the proportional regulating valve 7 to open when the inlet or outlet refrigerant temperature is lower than a preset temperature and the intensity of the reflected light is lower than a certain set value, and controls the proportional regulating valve 7 to close when the temperature difference between the inlet and outlet refrigerant temperatures is less than a preset temperature difference and the intensity of the reflected light is higher than a certain set value; wherein, the opening degree of the proportional regulating valve 7 after opening is the ratio of the preset value to the temperature difference. Furthermore, the fiber optic demodulation device 13 is also used to control the proportional regulating valve 7 to open during defrosting and to control the proportional regulating valve 7 to close after defrosting is completed.

[0052] Specifically, when an air conditioner operates in a low-temperature environment, its fins may frost over. Frost has many negative effects on the air conditioner. The frost layer hinders heat exchange between the air and the fin surface, leading to poorer cooling or heating performance and a significant increase in energy consumption. Therefore, when frost is detected during operation, the air conditioning system will activate defrosting. When defrosting begins, a signal is transmitted to the proportional control valve 7, which opens. The high-temperature refrigerant in the exhaust pipe flows through the metal capillary tube 5 to the air conditioner chassis, heating the chassis and melting the ice. Finally, it flows into the condenser downstream pipe 15, completing the circulation. A pressure difference exists between the high-temperature, high-pressure refrigerant in the exhaust pipe and the low-temperature, low-pressure refrigerant in the condenser downstream pipe 15. Therefore, the refrigerant in the circulation system will generate power due to this pressure difference and flow in one direction. When defrosting ends, a signal is simultaneously transmitted to the proportional control valve 7, which closes, ending the chassis de-icing process.

[0053] Because air conditioners may experience situations where the fins are not frosted and defrosting is not initiated, but the chassis is icy, the defrosting process will fail to start. Therefore, when the first fiber optic temperature sensor 1 or the second fiber optic temperature sensor 2 detects a temperature lower than a certain set temperature t... a At that time, and the fiber optic infrared sensor monitors the intensity I of the reflected light. ref Below a certain set value I c At this time, the signal is transmitted to the proportional control valve 7, which opens. The high-temperature refrigerant in the exhaust pipe flows through the metal capillary tube 5 to the air conditioning chassis, heating the chassis to melt the ice, and finally flows into the condenser rear pipe 15, completing the circulation. Because the high-temperature refrigerant cools down when it flows through the low-temperature chassis, there will be a temperature difference Δt between the refrigerant flowing into and out of the chassis. The first fiber optic temperature sensor 1 monitors the temperature at the refrigerant inlet, which is set to t. i The second fiber optic temperature sensor 2 monitors the temperature at the refrigerant outlet, set to t. o ,but:

[0054] Δt=t i -t o

[0055] When Δt is less than a certain set value t cAnd the intensity I of the reflected light ref Higher than a certain set value I c At this time, the proportional adjustment valve 7 is closed, and the automatic chassis icing is completed. t0 and t c The specific value is determined by the specific circumstances.

[0056] Let the opening degree of the proportional control valve 7 be K, and a certain constant be C. Then the opening and closing of the proportional control valve 7 can be expressed by the following formula:

[0057]

[0058] The opening of the proportional control valve 7 is inversely proportional to Δt. The smaller Δt is, the worse the defrosting effect is, and the opening of the proportional control valve 7 should be increased.

[0059] according to Figure 5 The connection relationship of each part of the device is shown. The fiber optic demodulation device 13 is turned on. When the air conditioner is turned on, the fins are frosted or the fiber optic grating sensor detects that the temperature of the air conditioner chassis is lower than a certain set value T0 and the fiber optic infrared sensor detects the intensity I of the reflected light. ref Below a certain set value I c When the defrosting device or fiber optic demodulation device 13 transmits a signal to the proportional control valve 7, the proportional control valve 7 opens, releasing the high-temperature refrigerant. This refrigerant flows through the metal capillary tube 5 from the exhaust pipe into the low-temperature air conditioning chassis, and then into the condenser's downstream pipe 15, completing the cycle. The proportional control valve 7 can adjust its opening degree according to the temperature, controlling the refrigerant flow and regulating the defrosting speed and effect. Finally, when the air conditioning fin defrosting is complete or the fiber optic grating sensor detects a refrigerant temperature difference Δt between the inlet and outlet of the chassis exceeding a certain set value t... c And the intensity I of the reflected light ref Higher than a certain set value I c When the time is up, close the proportional regulating valve 7, and the air conditioner defrosting is complete.

[0060] High-temperature refrigerant is introduced into the chassis through a metal capillary tube 5 to heat the air conditioning chassis, thereby achieving the purpose of de-icing. A fiber optic grating sensor is used to monitor the temperature. Its advantages are: 1) There is no risk of fire or explosion during the chassis de-icing and temperature monitoring process, ensuring high safety; 2) The use of an embedded sensor during temperature monitoring enables high-precision monitoring of the air conditioning chassis temperature and real-time, rapid feedback control of the de-icing device based on temperature changes; 3) By combining finned defrosting with a fiber optic temperature sensor, the control accuracy of the air conditioning chassis de-icing is greatly improved, increasing the timeliness and effectiveness of de-icing. This invention features low energy consumption, low cost, simple structure, long service life, high safety, adjustable de-icing speed and effect, high temperature monitoring accuracy and fast response, and high control precision, solving the defects of traditional air conditioning chassis de-icing devices such as high energy consumption, significant safety hazards, and limited service life.

[0061] Example 2

[0062] In a preferred embodiment 2 of this utility model, an air conditioner outdoor unit is provided, which includes the air conditioner chassis in the above embodiment 1.

[0063] In the above embodiments, an air conditioning chassis is provided, which has a refrigerant coil for heating by the refrigerant from the air conditioning unit. The refrigerant coil has a refrigerant inlet and a refrigerant outlet, and is equipped with a first fiber optic temperature sensor and a second fiber optic temperature sensor to detect the inlet and outlet refrigerant temperatures, respectively. A reflected light sensor is also provided above the air conditioning chassis to detect the intensity of reflected light. Based on the intensity of reflected light, the reflection status of the air conditioning chassis can be determined. Combined with the refrigerant temperature, the icing status of the air conditioning chassis can be accurately determined to control the de-icing process. Therefore, this invention achieves de-icing by introducing high-temperature refrigerant from the air conditioning unit into the air conditioning chassis to heat it. The use of fiber optic sensors to detect temperature and light sensors to detect reflected light intensity eliminates the risk of fire and explosion, ensuring high safety. Furthermore, the embedded temperature sensors enable high-precision temperature detection of the air conditioning chassis. Combined with the reflected light intensity, the icing status of the air conditioning chassis can be accurately determined, significantly improving the control accuracy and timeliness of de-icing and enhancing the de-icing effect.

[0064] Example 3

[0065] Based on the air conditioner outdoor unit provided in Embodiment 2 above, a preferred embodiment 3 of this utility model further provides an air conditioning unit, including the air conditioner outdoor unit. Specifically, Figure 4 and Figure 5 This diagram shows one possible structural block diagram of the air conditioning unit, such as... Figure 5 As shown, the air conditioning unit includes: an air conditioning unit (including a compressor 8, a vapor-liquid separator 12, a plate heat exchanger, air conditioning connecting pipes and other components), an air conditioning chassis, a metal capillary tube 5, a fiber optic grating sensor, a fiber optic demodulation device 13, a signal transmission line, a proportional control valve 7, refrigerant, etc.

[0066] In the above embodiments, an air conditioning chassis is provided, which has a refrigerant coil for heating by the refrigerant from the air conditioning unit. The refrigerant coil has a refrigerant inlet and a refrigerant outlet, and is equipped with a first fiber optic temperature sensor and a second fiber optic temperature sensor to detect the inlet and outlet refrigerant temperatures, respectively. A reflected light sensor is also provided above the air conditioning chassis to detect the intensity of reflected light. Based on the intensity of reflected light, the reflection status of the air conditioning chassis can be determined. Combined with the refrigerant temperature, the icing status of the air conditioning chassis can be accurately determined to control the de-icing process. Therefore, this invention achieves de-icing by introducing high-temperature refrigerant from the air conditioning unit into the air conditioning chassis to heat it. The use of fiber optic sensors to detect temperature and light sensors to detect reflected light intensity eliminates the risk of fire and explosion, ensuring high safety. Furthermore, the embedded temperature sensors enable high-precision temperature detection of the air conditioning chassis. Combined with the reflected light intensity, the icing status of the air conditioning chassis can be accurately determined, significantly improving the control accuracy and timeliness of de-icing and enhancing the de-icing effect.

[0067] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0068] In the above embodiments of this utility model, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0069] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0070] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0071] Furthermore, in the various embodiments of this utility model, the functional units can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0072] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this utility model, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this utility model. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0073] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art that are not covered by the invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0074] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. An air conditioning chassis, characterized in that, include: A refrigerant coil, located inside the air conditioning chassis, is connected to the refrigerant pipeline of the air conditioning unit and is used to introduce refrigerant from the air conditioning unit to heat and defrost the air conditioning chassis; wherein, the refrigerant coil has a refrigerant inlet and a refrigerant outlet; A refrigerant regulating device, one end of which is connected to the refrigerant pipeline of the air conditioning unit and the other end of which is connected to the refrigerant coil, is used to control the refrigerant flow rate into the refrigerant coil; The first fiber optic temperature sensor is located inside the refrigerant inlet and is used to detect the inlet refrigerant temperature. The second fiber optic temperature sensor is located inside the refrigerant outlet and is used to detect the outlet refrigerant temperature. A reflected light sensor, located above the air conditioner chassis, is used to detect the intensity of reflected light from the air conditioner chassis. The control device is connected at one end to the first fiber optic temperature sensor, the second fiber optic temperature sensor, and the reflected light sensor, and at the other end to the refrigerant regulating device. It is used to control the refrigerant flow rate entering the refrigerant coil based on the inlet refrigerant temperature, the outlet refrigerant temperature, and the reflected light intensity.

2. The air conditioner pan of claim 1, wherein The air conditioning chassis also includes: The refrigerant inlet pipe has one end connected to the refrigerant inlet and the other end connected to the refrigerant pipeline of the air conditioning unit, and is used to introduce the refrigerant of the air conditioning unit into the refrigerant coil. The refrigerant outlet pipe has one end connected to the refrigerant outlet and the other end connected to the refrigerant pipeline of the air conditioning unit, and is used to introduce the refrigerant from the refrigerant coil into the air conditioning unit.

3. The air conditioner pan of claim 2, wherein The air conditioning unit includes a compressor, a four-way valve, an evaporator, and a condenser connected in sequence. The refrigerant inlet pipe is connected to the refrigerant pipeline located between the compressor's exhaust port and the four-way valve, and the refrigerant outlet pipe is connected to the refrigerant pipeline located between the condenser's refrigerant outlet and the four-way valve.

4. The air conditioner pan of claim 2, wherein The refrigerant regulating device includes: A proportional regulating valve is located at the connection between the refrigerant inlet pipe and the refrigerant pipeline of the air conditioning unit, and is used to regulate the refrigerant flow rate entering the refrigerant inlet pipe.

5. The air conditioner pan of claim 4, wherein The reflected light sensor is a fiber optic infrared sensor, used to emit infrared light into the air conditioner chassis and detect the intensity of the reflected light; the control device includes: The fiber optic demodulation device is connected at one end to the first fiber optic temperature sensor, the second fiber optic temperature sensor, and the fiber optic infrared sensor, and at the other end to the proportional regulating valve. It is used to determine the icing condition of the air conditioning chassis based on the inlet refrigerant temperature, the outlet refrigerant temperature, and the reflected light intensity, and to adjust the opening of the proportional regulating valve according to the icing condition to regulate the refrigerant flow rate into the refrigerant inlet pipe.

6. The air conditioner pan of claim 1, wherein The air conditioning chassis includes an upper chassis and a lower chassis, the upper chassis and the lower chassis having corresponding grooves, and the refrigerant flow path formed by the grooves serves as the refrigerant coil.

7. An air conditioner outdoor unit characterized by comprising: Includes the air conditioning chassis as described in any one of claims 1 to 6.

8. An air conditioning unit characterized by, Includes the outdoor unit of the air conditioner as described in claim 7.

Images